Global Warming Resource Page 3

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Date
 Topic
 Website
 Author
12/11/09
 What is Global Warming?
 http://en.wikipedia.org/wiki/Global_warming
 Wikimedia Foundation, Inc.
12/18/09
 Global warming causes
 http://environment.nationalgeographic.com/environment/global-warming/gw-causes.html
 National Geographic Society
12/18/09
 Global warming effects
 http://environment.nationalgeographic.com/environment/global-warming/gw-effects.html
 National Geographic Society
1/12/10
 Black Walnut (one of best
Co2 absorbing trees)
 http://www.gardenguides.com/87503-black-walnut-tree.html
 Garden Guides
1/12/10
 White Pine (one of best
Co2 absorbing trees.)
 http://www.dcnr.state.pa.us/forestry/commontr/ewhitep.htm
 Pennsylvania Department of
Conservation and Natural Research